John thought it wouldn’t be long he was ready for his new job.A. sinceB. whenC. beforeD.

问题补充：

John thought it wouldn’t be long he was ready for his new job.

A. since

B. when

C. before

D. after

答案：

A. since

B. when

(答案→)C. before

D. after

解析：考查引导词，since表示自从；when表示时间，引导时间转语从句；或者定语从句；before表示在…之前；after表示在…之后，句子意思“约翰认为用不了多长时间为新工作做准备”